Motor rotor press-fitting device and motor rotor press-fitting method

Abstract

The application relates to a motor rotor press-fitting device and a motor rotor press-fitting method. The press-fitting device comprises a positioning mechanism and a pressing mechanism which are oppositely arranged in the vertical direction. The positioning mechanism comprises a fixed seat and a rotating seat which are rotationally matched, the rotating seat is used for clamping the rotating shaft of the rotor, a positioning structure is arranged between the fixed seat and the rotating seat, the positioning structure is used for rotating and positioning the rotating seat to at least two preset positions relative to the fixed seat, and the rotating angle of the rotating seat between two adjacent preset positions corresponds to the deflection angle of two adjacent cores in the rotor. The pressing mechanism comprises a driving assembly and a pressure head connected with the driving assembly, the pressure head is oppositely arranged with the rotating seat, the pressure head is used for clamping the end plate and the core of the rotor, and the driving assembly is used for driving the pressure head to move close to or away from the rotating seat. The motor rotor press-fitting device can more accurately and conveniently realize the inclined step assembly of the rotor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an electric machine rotor pressing device and a pressing method of an electric machine rotor. BACKGROUND

[0002] In a new energy automobile driving electric machine, a rotor is an important component, and the electric machine rotor generally comprises a rotating shaft, a front end plate, a rear end plate, a fixing ring and an iron core. The iron core usually comprises multiple sections, the multiple sections of the iron core are sequentially sleeved on the rotating shaft, the front end plate and the rear end plate are respectively fixed at two ends of the iron core, and the fixing ring is fixed outside the rear end plate. In order to effectively weaken the additional torque caused by the tooth harmonic magnetic field, reduce the vibration and noise of the electric machine battery, and ensure the smooth operation of the engine, the iron core of the electric machine rotor usually adopts inclined grade pressing. That is, when pressing the iron core, the adjacent two iron cores are deflected by a certain angle.

[0003] In the traditional rotor inclined grade assembly, the iron core cannot be accurately positioned, which leads to the fact that the accuracy of the inclined grade assembly cannot be guaranteed. Also, the iron core of some rotors is positioned by means of key grooves between the iron core and the rotating shaft of the rotor to realize the inclined grade assembly of the iron core. That is, key grooves are arranged on the rotating shaft of the rotor, and corresponding key grooves are arranged on the rotor iron core. In order to realize the inclined grade assembly of the rotor iron core, the positions of the key grooves on the adjacent two groups of rotor iron cores are offset to each other, and the inclined grade assembly of the rotor can be realized after assembly. However, such an assembly method requires key grooves to be arranged on the rotating shaft of the rotor and the rotor iron core, and the key grooves with different positions are arranged on different grades of rotor iron cores, which increases the processing procedures and the processing cost. SUMMARY

[0004] Therefore, it is necessary to provide an electric machine rotor pressing device and a pressing method of an electric machine rotor for more accurately and conveniently realizing the inclined grade assembly of the rotor.

[0005] The technical scheme is as follows

[0006] On the one hand, the present application provides an electric machine rotor pressing device, comprising:

[0007] A positioning mechanism, the positioning mechanism comprises a fixed seat and a rotating seat in rotational cooperation, the rotating seat is used for clamping the rotating shaft of the rotor, a positioning structure is arranged between the fixed seat and the rotating seat, the positioning structure is used for rotating and positioning the rotating seat relative to the fixed seat to at least two preset positions, and the angle through which the rotating seat rotates between the adjacent two preset positions corresponds to the deflection angle of the adjacent two iron cores in the rotor one by one; and

[0008] A pressing mechanism comprises a driving assembly and a pressing head connected with the driving assembly, the pressing head is arranged opposite to the rotating seat and used for clamping the end plate and the core of the rotor, and the driving assembly is used for driving the pressing head to move close to or away from the rotating seat.

[0009] The technical scheme of the present application is further described as follows:

[0010] In one of the embodiments, the positioning structure comprises at least two first positioning holes arranged on the fixed seat and a second positioning hole arranged on the rotating seat, the at least two first positioning holes are distributed circumferentially around the rotation axis of the rotating seat, the central angle between any two adjacent first positioning holes corresponds to the deflection angle of any two adjacent cores, the rotating seat can be rotated to align the second positioning hole with any first positioning hole, and the second positioning hole is provided with a first positioning member which can be inserted into the first positioning hole.

[0011] Alternatively, the positioning structure comprises at least two first positioning holes arranged on the rotating seat and a second positioning hole arranged on the fixed seat, the central angle between any two adjacent first positioning holes corresponds to the deflection angle of any two adjacent cores, the rotating seat can be rotated to align the second positioning hole with any first positioning hole, and the second positioning hole is provided with a first positioning member which can be inserted into the first positioning hole.

[0012] In one of the embodiments, the rotating seat is provided with a first accommodating cavity for the shaft to pass through, and the rotating seat is further provided with a first locking member which passes through the first accommodating cavity and is used for locking the shaft.

[0013] In one of the embodiments, the fixed seat is further provided with a first avoiding hole for the shaft to pass through, and the first avoiding hole is communicated with the first accommodating cavity.

[0014] In one of the embodiments, the fixed seat is provided with a limiting slot, the rotating seat is provided with a limiting protrusion which is rotatably arranged in the limiting slot; alternatively, the rotating seat is provided with a limiting slot, and the fixed seat is provided with a limiting protrusion which is rotatably arranged in the limiting slot.

[0015] In one of the embodiments, the pressing head is provided with a second accommodating cavity for accommodating the core or the end plate, and the rotating seat is further provided with a second locking member which passes through the second accommodating cavity and is used for locking the core or the end plate.

[0016] In one of the embodiments, the second accommodating cavity is provided with a second positioning member, which is used to be inserted into the iron core to position the iron core in the circumferential direction; and / or, the second accommodating cavity is provided with a third positioning member, which is used to be inserted into the end plate to position the end plate in the circumferential direction.

[0017] In one of the embodiments, the driving assembly comprises a driver and a connecting shaft, one end of the connecting shaft is connected with the pressing head, and the other end of the connecting shaft is connected with the output shaft of the driver.

[0018] In one of the embodiments, the connecting shaft is provided with a second avoiding hole, through which the rotating shaft is inserted, and the second avoiding hole is communicated with the second accommodating cavity.

[0019] In one of the embodiments, the motor rotor pressing device further comprises a rack, the rack comprises a first mounting rack and a second mounting rack arranged oppositely, the fixing seat is mounted on the first mounting rack, and the driving assembly is mounted on the second mounting rack.

[0020] In another aspect, the application further provides a motor rotor pressing method, which is implemented by using the motor device pressing device, and comprises the following steps.

[0021] The rotating shaft of the rotor is clamped to the rotating seat, and the rotating seat is positioned to a first preset position by the positioning structure;

[0022] The first end plate of the rotor is clamped to the pressing head, and the pressing head is driven by the driving assembly to move towards the rotating seat to press the first end plate to the rotating shaft;

[0023] The first-stage iron core of the rotor is clamped to the pressing head, and the pressing head is driven by the driving assembly to move towards the rotating seat to press the first-stage iron core to the rotating shaft;

[0024] The rotating seat is positioned to a next preset position by the positioning structure, and the next-stage iron core of the rotor is pressed to the rotating shaft by the pressing mechanism;

[0025] The above step is repeated until all the iron cores are sequentially pressed to the rotating shaft;

[0026] The rotating seat is positioned to the first preset position by the positioning structure, and the second end plate of the rotor is pressed to the rotating shaft by the pressing mechanism;

[0027] The fixing ring of the rotor is sleeved on the rotating shaft, and the fixing ring is pressed to the rotating shaft by the pressing mechanism.

[0028] The motor rotor press-fitting device and the press-fitting method thereof can press-fit the first end plate, the multi-stage core, the second end plate and the fixing ring of the motor rotor onto the rotating shaft of the motor rotor in sequence by clamping the rotating shaft of the motor rotor through the positioning mechanism and then applying pressure through the pressure applying mechanism, so that the assembly of the motor rotor is more labor-saving and convenient. Meanwhile, the positioning mechanism is configured to include the fixed seat and the rotating seat connected in rotation, and the positioning structure is arranged between the fixed seat and the rotating seat, so that the rotating seat can be positioned to at least two preset positions through the positioning structure, and since the angle of rotation of the rotating seat between the adjacent two preset positions corresponds to the deflection angle of the adjacent two cores in the motor rotor to be assembled, the rotating seat can be positioned to the corresponding preset position through the positioning structure when the multi-stage core of the motor rotor is press-fitted onto the rotating shaft, so that the deflection angle of the assembly of the multi-stage core can be accurately controlled, the motor rotor is more accurately and conveniently assembled in stages, and the key groove does not need to be formed on the rotating shaft and the core, so that the production efficiency is improved and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The drawings illustrate one exemplary embodiment of the present application and, together with the description, serve to explain the application.

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0031] Figure 1 The structure schematic view of the motor rotor of an embodiment is shown.

[0032] Figure 2 The sectional view of the motor rotor of an embodiment along A-A is shown.

[0033] Figure 3 The structure schematic view of the motor rotor press-fitting device of an embodiment is shown.

[0034] Figure 4 The front view of the motor rotor press-fitting device shown in the embodiment is shown. Figure 3 The front view of the motor rotor press-fitting device shown in the embodiment is shown.

[0035] Figure 5 The sectional view of the motor rotor press-fitting device shown in the embodiment along B-B is shown. Figure 4 The sectional view of the motor rotor press-fitting device shown in the embodiment along B-B is shown.

[0036] Figure 6 The sectional view of the motor rotor press-fitting device shown in the embodiment along B-B is shown. Figure 3Structure diagram of the motor rotor press-fitting device shown in Fig. 1, hidden structure behind the frame and the driver.

[0037] Figure 7 For Figure 6 Sectional view of the motor rotor press-fitting device shown in Fig. 1.

[0038] Figure 8 For Figure 7 Sectional view of the motor rotor press-fitting device shown in Fig. 1 at C-C section.

[0039] Figure 9 For Figure 7 Sectional view of the motor rotor press-fitting device shown in Fig. 1 at D-D section.

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 10, motor rotor; 11, rotating shaft; 12, first end plate; 13, first stage core; 14, second stage core; 15, third stage core; 16, fourth stage core; 17, second end plate; 18, fixing ring; 20, positioning mechanism; 21, fixing seat; 211, first positioning hole; 212, first avoiding hole; 213, limiting groove; 22, rotating seat; 221, second positioning hole; 222, first positioning member; 223, first accommodating cavity; 224, first locking member; 225, limiting protrusion; 30, pressing mechanism; 31, pressing head; 311, second accommodating cavity; 312, second locking member; 313, second positioning member; 314, third positioning member; 32, connecting shaft; 321, second avoiding hole; 33, driver; 41, first mounting frame; 42, second mounting frame. DETAILED DESCRIPTION

[0042] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways beyond the specific embodiments described and claimed herein. It is therefore intended that the present application not be limited in scope to the specific embodiments disclosed but rather that it encompass all changes and modifications that can be made within the scope of the appended claims.

[0043] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0044] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0047] It is to be noted that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when a method is referred to as comprising a step of doing something, it can include an equivalent step of doing the same thing. The terms "first", "second", "third", etc. are used herein to describe various elements, regions, layers, sections, etc. and are only used to distinguish one element, region, layer, section, or the like from another element, region, layer, section, or the like. It is to be understood that the terms "first", "second", "third", etc. are not used to denote a physical order or a particular order of execution. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used herein are merely used for the purpose of illustration and are not intended to be limiting.

[0048] An embodiment of the present application provides a motor rotor press-fitting device for assembling a motor rotor 10. Specifically, referring to Figure 1 and Figure 2 In an embodiment, the motor rotor 10 to be assembled includes a rotating shaft 11, a first end plate 12, multiple stages of cores, a second end plate 17, and a fixing ring 18. Specifically, in this embodiment, four stages of cores are included, namely a first stage of cores 13, a second stage of cores 14, a third stage of cores 15, and a fourth stage of cores 16. The four stages of cores are sequentially sleeved on the rotating shaft 11, the first end plate 12 is sleeved on the rotating shaft 11 and located at one side of the cores, the second end plate 17 is sleeved on the rotating shaft 11 and located at the other side of the cores, and the fixing ring 18 is sleeved on the rotating shaft 11 and located at the side of the second end plate 17 away from the cores. Further, in this embodiment, the first end plate 12, the second end plate 17, and the first stage of cores 13 are in the same direction position, and the deflection angle between any two adjacent cores in the four stages of cores is 120±3.3°.

[0049] Further, referring to Figures 3 to 5 The motor rotor press-fitting device of an embodiment includes a positioning mechanism 20 and a pressing mechanism 30 which are oppositely arranged in the vertical direction. The positioning mechanism 20 includes a fixed seat 21 and a rotating seat 22 which are rotationally fitted, the rotating seat 22 is used for clamping the rotating shaft 11 of the rotor, a positioning structure is arranged between the fixed seat 21 and the rotating seat 22, the positioning structure is used for rotating and positioning the rotating seat 22 to at least two preset positions relative to the fixed seat 21, and the angle through which the rotating seat 22 rotates between any two adjacent preset positions corresponds to the deflection angle between any two adjacent cores in the rotor. The pressing mechanism 30 includes a driving assembly and a pressure head 31 connected with the driving assembly, the pressure head 31 is oppositely arranged with the rotating seat 22, the pressure head 31 is used for clamping the end plate and the cores of the rotor, and the driving assembly is used for driving the pressure head 31 to move close to or away from the rotating seat 22.

[0050] Specifically, the motor rotor 10 pressing device in use first clamps the rotating shaft 11 of the rotor to the rotating seat 22, then rotates the rotating seat 22 and positions the rotating seat 22 to the first preset position through the positioning structure. Then clamp the first end plate 12 into the pressing head 31, drive the pressing head 31 to move towards the rotating seat 22 through the driving assembly to press the first end plate 12 to the rotating shaft 11. After the first end plate 12 is pressed and assembled, the driving assembly drives the pressing head 31 to return to the initial position. Then clamp the first stage core 13 of the rotor into the pressing head 31, drive the pressing head 31 to move towards the rotating seat 22 through the driving assembly to press the first stage core 13 to the rotating shaft 11. Then position the rotating seat 22 to the next preset position through the positioning structure, similar to the pressing of the first stage core 13, the next stage core of the rotor is pressed and assembled to the rotating shaft 11 through the pressing mechanism 30. Then position the rotating seat 22 to the next preset position, press and assemble the next stage core, and repeat the above steps until all the cores of the rotating shaft 11 are sequentially pressed and assembled to the rotating shaft 11. Then position the rotating seat 22 back to the first preset position through the positioning structure, and press and assemble the second end plate 17 of the rotor to the rotating shaft 11 through the pressing mechanism 30; finally, the fixing ring 18 of the rotor is sleeved on the rotating shaft 11, and the fixing ring 18 is pressed to the rotating shaft 11 through the pressing mechanism 30, so that the inclined stage assembly of the motor rotor 10 is completed.

[0051] The motor rotor 10 pressing device clamps the rotating shaft 11 of the motor rotor 10 through the positioning mechanism 20, and then sequentially presses and assembles the first end plate 12, the multi-stage core, the second end plate 17 and the fixing ring 18 of the motor rotor 10 to the rotating shaft 11 through the pressing mechanism 30, so that the assembly of the motor rotor 10 is more labor-saving and convenient. At the same time, the positioning mechanism 20 is configured to include the fixed seat 21 and the rotating seat 22 connected in rotation, and the positioning structure is arranged between the fixed seat 21 and the rotating seat 22. The rotating seat 22 can be positioned to at least two preset positions through the positioning structure, and the angle of rotation of the rotating seat 22 between the adjacent two preset positions corresponds to the deflection angle of the adjacent two cores in the motor rotor 10 to be assembled, so that when the cores of the motor rotor 10 are pressed and assembled to the rotating shaft 11, the rotating seat 22 can be positioned to the corresponding preset position through the positioning structure, so that the deflection angle of the assembly of each stage core can be accurately controlled, the inclined stage assembly of the motor rotor 10 is more accurate and convenient, and the key groove does not need to be opened on the rotating shaft 11 and the core, which saves the process, improves the production efficiency and reduces the cost.

[0052] Referring to Figure 8 and Figure 9The positioning structure comprises at least two first positioning holes 211 formed on the fixed seat 21 and a second positioning hole 221 formed on the rotating seat 22. The at least two first positioning holes 211 are distributed circumferentially around the rotation axis of the rotating seat 22, and the central angle corresponding to each two adjacent first positioning holes 211 corresponds to the deflection angle of each two adjacent cores. The rotating seat 22 can be rotated to align the second positioning hole 221 with the at least two first positioning holes 211 in sequence. In combination with Figure 6 The second positioning hole 221 is provided with a first positioning member 222 which can be inserted into the first positioning hole 211.

[0053] Specifically, for example, in the embodiment, three first positioning holes 211 are formed on the fixed seat 21, and the three first positioning holes 211 are uniformly distributed around the rotation axis of the rotating seat 22, i.e. the central angle corresponding to each two adjacent first positioning holes 211 is 120°, so as to correspond to the deflection angle of each two adjacent cores in the embodiment. When the first end plate 12, the second end plate 17, the first core 13, the fourth core 16 and the fixed ring 18 need to be press-fitted, the rotating seat 22 is rotated to align the second positioning hole 221 with the lowermost first positioning hole 211 of the fixed seat 21, and then the first positioning member 222 is inserted into the first positioning hole 211 and the second positioning hole 221 to fix the position of the rotating seat 22 at this time. Figure 8 When the second core needs to be press-fitted, the rotating seat 22 is rotated to align the second positioning hole 221 with the upper left first positioning hole 211 of the fixed seat 21, and then the first positioning member 222 is inserted into the first positioning hole 211 and the second positioning hole 221 to fix the position of the rotating seat 22 at this time. Figure 8 When the third core needs to be press-fitted, the rotating seat 22 is rotated to align the second positioning hole 221 with the upper right first positioning hole 211 of the fixed seat 21, and then the first positioning member 222 is inserted into the first positioning hole 211 and the second positioning hole 221 to fix the position of the rotating seat 22 at this time. Figure 8 In this way, the deflection angle of each two adjacent cores in the press-fitted motor rotor 10 can be ensured to be 120°, and the inclined stage installation of the motor rotor is more accurately and conveniently realized. Preferably, the first positioning member 222 is a positioning pin. It should be noted that in other embodiments, the number of the first positioning holes 211 and the central angle between each two adjacent first positioning holes 211 can be set according to the number of the cores to be press-fitted and the deflection angle, which is not limited herein.

[0054] Understandably, in other embodiments, the rotating seat 22 can be provided with at least two first positioning holes 211, and the fixed seat 21 can be provided with a second positioning hole 221, so that the inclined stage installation of the motor rotor can also be realized, which is not described herein.

[0055] Referring to Figure 6 and Figure 7Optionally, in an embodiment, the rotating seat 22 is provided with a first accommodating cavity 223 for the rotating shaft 11 to pass through, and the rotating seat 22 is further provided with a first locking member 224 passing through the first accommodating cavity 223, and the first locking member 224 is used for locking or releasing the rotating shaft 11. Specifically, in the embodiment, the rotating seat 22 is provided with a first threaded hole penetrating the first accommodating cavity 223 in the radial direction, and the first locking member 224 is a bolt, and the first locking member 224 is arranged in the first threaded hole, so that when the rotating shaft 11 is inserted into the first accommodating cavity 223, the rotating shaft 11 can be locked in the first accommodating cavity 223 by rotating the first locking member 224 to make the first locking member 224 abut against the rotating shaft 11, thereby ensuring the stability during the pressing assembly of the motor rotor 10. When the pressing assembly of the motor rotor 10 is completed, the locking of the rotating shaft 11 can be released by loosening the first locking member 224 to separate the first locking member 224 from the rotating shaft 11. Preferably, the rotating seat 22 is provided with a plurality of first locking members 224 spaced apart in the circumferential direction, thereby increasing the stability of the clamping of the rotating shaft 11 and avoiding the shaking of the rotating shaft 11 during the pressing assembly.

[0056] Continuing to refer to Figure 7 The fixed seat 21 is further provided with a first avoiding hole 212 for the rotating shaft 11 to pass through, and the first avoiding hole 212 is communicated with the first accommodating cavity 223, thereby avoiding the interference between the rotating shaft 11 and the fixed seat 21 when the rotating shaft 11 is relatively long.

[0057] Referring to Figure 7 Optionally, in an embodiment, the fixed seat 21 is provided with a limiting groove 213, and the rotating seat 22 is provided with a limiting protrusion 225 which is rotatably arranged in the limiting groove 213, thereby realizing the rotational cooperation between the rotating seat 22 and the fixed seat 21. Preferably, in the embodiment, the limiting groove 213 is a circular groove, and the limiting protrusion 225 is a cylindrical protrusion matched with the limiting groove 213. The limiting groove 213 and the limiting protrusion 225 are coaxially arranged, and in other embodiments, the limiting groove 213 can be an annular groove, and correspondingly, the limiting protrusion 225 is an annular protrusion. It is worth mentioning that in another embodiment, the limiting groove 213 can be arranged on the rotating seat 22, and correspondingly, the limiting protrusion 225 is arranged on the fixed seat 21, so that the rotational cooperation between the rotating seat 22 and the fixed seat 21 can also be realized.

[0058] Referring to Figure 6 and Figure 7, the second accommodating cavity 311 is a circular cavity, and an inner diameter of the second accommodating cavity 311 is greater than diameters of the cores and the end plate of the motor rotor 10, so that the cores or the end plate can be placed into the second accommodating cavity 311. Further, the pressing head 31 is provided with a second threaded hole penetrating the second accommodating cavity 311 in a radial direction, and the second locking member 312 is a bolt, which is arranged in the second threaded hole. When the core or the end plate is placed into the second accommodating cavity 311, the core or the end plate can be clamped in the pressing assembly by rotating the second locking member 312 to abut the second locking member 312 against the core or the end plate, and then the core or the end plate can be pressed onto the rotating shaft 11 by driving the pressing head to descend by the driving assembly. When the pressing of the core or the end plate is completed, the pressing head 31 can be separated from the core or the end plate by rotating the second locking member 312 to separate the second locking member 312 from the core or the end plate, and then the pressing head 31 can be lifted to the initial position by the driving assembly.

[0059] Optionally, in an embodiment, the second accommodating cavity 311 is provided with a second positioning member 313, which is used to be inserted into a process hole on the core to position the core in a circumferential direction. Specifically, the second positioning member 313 is used to be inserted into the process hole on the core to limit the core in the circumferential direction and to position an initial angle of the core, so that the core is prevented from rotating during the pressing process to affect the pressing precision. Preferably, in the embodiment, the second positioning member 313 is a positioning pin, which is arranged in the second accommodating cavity 311 from a top of the pressing head 31. In other embodiments, the second positioning member 313 can be integrally formed in the second accommodating cavity 311.

[0060] Further, the second accommodating cavity 311 is provided with a third positioning member 314, which is used to be inserted into a process hole on the end plate to position the end plate in a circumferential direction. Specifically, the third positioning member 314 is used to be inserted into the process hole on the end plate to limit the end plate in the circumferential direction and to position an initial angle of the end plate, so that the end plate is prevented from rotating during the pressing process to affect the pressing precision. Preferably, in the embodiment, the third positioning member 314 is a positioning pin, which is arranged in the second accommodating cavity 311 from a top of the pressing head 31. In other embodiments, the third positioning member 314 can be integrally formed in the second accommodating cavity 311.

[0061] Referring to Figure 5The driving assembly comprises a driver 33 and a connecting shaft 32, one end of the connecting shaft 32 is connected with the pressing head 31, and the other end of the connecting shaft 32 is connected with an output shaft of the driver 33. Further, the connecting shaft 32 is provided with a second avoiding hole 321 for the rotating shaft 11 to pass through, and the second avoiding hole 321 is communicated with the second accommodating cavity 311, so as to avoid interference between the rotating shaft 11 and the pressing head 31 or the connecting shaft 32 during the pressing process. Preferably, the driver 33 can be an electric cylinder or a hydraulic cylinder, which is not limited here.

[0062] Further, the motor rotor pressing device further comprises a rack, the rack comprises a first mounting rack 41 and a second mounting rack 42 arranged oppositely, the fixing seat 21 is mounted on the first mounting rack 41, and the driving assembly is mounted on the second mounting rack 42. Specifically, the fixing seat 21 can be fixed on the first mounting rack 41 through bolts and positioning pins, the driver 33 of the driving assembly is mounted on the side of the second mounting rack 42 away from the first mounting rack 41, the connecting shaft 32 is arranged between the first mounting rack 41 and the second mounting rack 42, and the output shaft of the driver 33 passes through the second mounting rack 42 and is connected with the connecting shaft 32. In this way, the overall structure of the motor rotor pressing device is more reasonable and compact.

[0063] On the other hand, the application also provides a pressing method of the motor rotor 10, specifically, the pressing method of the motor rotor 10 is implemented by using the motor device pressing device of any one of the above-mentioned embodiments, and comprises the following steps:

[0064] S110: clamping the rotating shaft 11 of the rotor to the rotating seat 22, and positioning the rotating seat 22 to the first predetermined position through the positioning structure.

[0065] Specifically, the rotating shaft 11 is inserted into the first accommodating cavity of the rotating seat 22, and the rotating shaft 11 is locked on the rotating seat 22 by screwing the first locking member 224. The rotating seat 22 is rotated to the second positioning hole 221 aligned with the lowermost first positioning hole 211 of the fixing seat 21, and then the first positioning member 222 is inserted into the first positioning hole 211 and the second positioning hole 221 to fix the rotating seat 22 at the first predetermined position.

[0066] S120: clamping the first end plate 12 of the rotor into the pressing head 31, and driving the pressing head 31 to move towards the rotating seat 22 by the driving assembly to press the first end plate 12 to the rotating shaft 11.

[0067] Specifically, the first end plate 12 is placed into the second accommodating cavity of the pressing head 31, the third positioning member 314 is inserted into the process hole of the first end plate 12, and then the second locking member 312 is tightened to fix the first end plate 12 in the pressing head 31. Then the driving assembly drives the pressing head 31 to descend to press the first end plate 12 onto the rotating shaft 11, finally the second locking member 312 is loosened, the driving assembly drives the pressing head 31 to ascend so that the pressing head 31 is separated from the first end plate 12, thereby completing the press fitting of the first end plate 12.

[0068] S130: The first-stage core 13 of the rotor is clamped into the pressing head 31, and the driving assembly drives the pressing head 31 to move towards the rotating seat 22 to press the first-stage core 13 onto the rotating shaft 11.

[0069] Specifically, the first-stage core 13 is placed into the second accommodating cavity of the pressing head 31, the second positioning member 313 is inserted into the process hole of the first-stage core 13, and then the second locking member 312 is tightened to fix the first-stage core 13 in the pressing head 31. Then the driving assembly drives the pressing head 31 to descend to press the first-stage core 13 onto the rotating shaft 11, finally the second locking member 312 is loosened, the driving assembly drives the pressing head 31 to ascend so that the pressing head 31 is separated from the first-stage core 13, thereby completing the press fitting of the first-stage core 13.

[0070] S140: The rotating seat 22 is positioned to the next preset position through the positioning structure, and the next-stage core of the rotor is press fitted onto the rotating shaft 11 through the pressing mechanism 30.

[0071] Specifically, the rotating seat 22 is first rotated to the second positioning hole 221 aligning with the first positioning hole 211 on the upper left of the fixed seat 21, then the first positioning member 222 is inserted into the first positioning hole 211 and the second positioning hole 221 to fix the rotating seat 22 at the second predetermined position. Then the second-stage core 14 is placed into the second accommodating cavity of the pressing head 31, the second positioning member 313 is inserted into the process hole of the second-stage core 14, and then the second locking member 312 is tightened to fix the second-stage core 14 in the pressing head 31. Then the driving assembly drives the pressing head 31 to descend to press the second-stage core 14 onto the rotating shaft 11, finally the second locking member 312 is loosened, the driving assembly drives the pressing head 31 to ascend so that the pressing head 31 is separated from the second-stage core 14, thereby completing the press fitting of the second-stage core 14.

[0072] S150: The step S140 is repeated until all the cores are sequentially press fitted onto the rotating shaft 11.

[0073] Specifically, the rotating seat 22 is first rotated to the second positioning hole 221 aligning with the first positioning hole 211 on the upper right of the fixing seat 21, and then the first positioning member 222 is inserted into the first positioning hole 211 and the second positioning hole 221 to fix the rotating seat 22 at the third predetermined position. Then the third stage iron core 15 is press-fitted onto the rotating shaft 11 by the pressing mechanism 30 (the press-fitting process is similar to that of the first stage iron core 13 and the second stage iron core 14, which will not be repeated here). The rotating seat 22 is then rotated to the second positioning hole 221 aligning with the first positioning hole 211 on the lowermost side of the fixing seat 21, and then the first positioning member 222 is inserted into the first positioning hole 211 and the second positioning hole 221 to fix the rotating seat 22 back to the first predetermined position, and then the fourth stage iron core 16 is press-fitted onto the rotating shaft 11 by the pressing mechanism 30. In this way, the press-fitting of all the iron cores is completed. It is worth noting that when the motor rotor 10 has five, six or more stages of iron cores, the above steps S140 can be repeated until all the iron cores are press-fitted onto the rotating shaft 11.

[0074] S160: The rotating seat 22 is positioned to the first predetermined position by the positioning structure, and the second end plate 17 of the rotor is press-fitted onto the rotating shaft 11 by the pressing mechanism 30.

[0075] Specifically, the press-fitting of the second end plate 17 is similar to that of the first end plate 12, which will not be repeated here.

[0076] S170: The fixing ring 18 of the rotating shaft 11 is sleeved onto the rotating shaft 11, and the fixing ring 18 is press-fitted onto the rotating shaft 11 by the pressing mechanism 30.

[0077] Specifically, the fixing ring 18 can be heated before being press-fitted, preferably heated to 180°C, and then sleeved onto the rotating shaft 11, and then press-fitted onto the rotating shaft 11 by the pressing mechanism 30, so as to utilize the thermal expansion and contraction characteristics of the fixing ring 18 to make the connection between the fixing ring 18 and the rotating shaft 11 more stable, thereby more stably limiting other components on the rotating shaft 11.

[0078] The pressing method of the motor rotor 10 can press the first end plate 12, the multi-stage core, the second end plate 17 and the fixing ring 18 of the motor rotor 10 on the rotating shaft 11 in sequence by clamping the rotating shaft 11 of the motor rotor 10 through the positioning mechanism 20 and pressing through the pressing mechanism 30, so that the assembly of the motor rotor 10 can be completed more conveniently and labor-savingly. Meanwhile, the positioning mechanism 20 is configured to include the fixed seat 21 and the rotating seat 22 connected in rotation, and the positioning structure is arranged between the fixed seat 21 and the rotating seat 22, so that the rotating seat 22 can be positioned to at least two preset positions through the positioning structure. Since the rotating angle of the rotating seat 22 between the adjacent two preset positions corresponds to the deflection angle of the adjacent two cores in the motor rotor 10 to be assembled, the rotating seat 22 can be positioned to the corresponding preset position through the positioning structure when the multi-stage core of the motor rotor 10 is pressed on the rotating shaft 11, so that the deflection angle of the assembly of the multi-stage core can be accurately controlled, the inclined assembly of the motor rotor 10 is more accurate and convenient, and the key groove does not need to be arranged on the rotating shaft 11 and the core, so that the process is saved, the production efficiency is improved, and the cost is reduced.

[0079] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0080] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An electric motor rotor press fitting device characterized by comprising: The positioning mechanism comprises a fixed seat and a rotating seat which is used to clamp the rotating shaft of the rotor, and a positioning structure is arranged between the fixed seat and the rotating seat, which is used to rotate and position the rotating seat relative to the fixed seat to at least two preset positions, and the angle of rotation of the rotating seat between two adjacent preset positions corresponds to the deflection angle of two adjacent cores in the rotor. The pressing mechanism comprises a driving assembly and a pressure head connected with the driving assembly, the pressure head is arranged opposite to the rotating seat, and the pressure head is used to clamp the end plate and the core of the rotor, and the driving assembly is used to drive the pressure head to move close to or away from the rotating seat. The pressure head is provided with a second accommodating cavity for accommodating the core or the end plate, and the pressure head is further provided with a second locking member penetrating into the second accommodating cavity, which is used to lock the core or the end plate. The second accommodating cavity is provided with a second positioning member which is used to be inserted into the core to circumferentially position the core. The second accommodating cavity is provided with a third positioning member which is used to be inserted into the end plate to circumferentially position the end plate.

2. The motor rotor pressing device according to claim 1, wherein the positioning structure comprises at least two first positioning holes arranged on the fixed seat and a second positioning hole arranged on the rotating seat, the at least two first positioning holes are circumferentially distributed around the rotating axis of the rotating seat, the central angle between two adjacent first positioning holes corresponds to the deflection angle of two adjacent cores, and rotating the rotating seat can align the second positioning hole with any first positioning hole, and the second positioning hole is provided with a first positioning member which can be inserted into the first positioning hole. Alternatively, the positioning structure comprises at least two first positioning holes arranged on the rotating seat and a second positioning hole arranged on the fixed seat, the central angle between two adjacent first positioning holes corresponds to the deflection angle of two adjacent cores, and rotating the rotating seat can align the second positioning hole with any first positioning hole, and the second positioning hole is provided with a first positioning member which can be inserted into the first positioning hole. The rotating seat is provided with a first accommodating cavity for the rotating shaft to penetrate, and the rotating seat is further provided with a first locking member penetrating into the first accommodating cavity, which is used to lock the rotating shaft. The fixed seat is further provided with a first avoiding hole for the rotating shaft to penetrate, and the first avoiding hole is communicated with the first accommodating cavity. The fixed seat is provided with a limiting groove, and the rotating seat is provided with a limiting protrusion which is rotatably arranged in the limiting groove; or the rotating seat is provided with a limiting groove, and the fixed seat is provided with a limiting protrusion which is rotatably arranged in the limiting groove.

3. The motor rotor press fitting apparatus according to claim 1, wherein ​ 4. The motor rotor press fitting apparatus according to claim 3, wherein ​ 5. The motor rotor press fitting apparatus according to claim 1, wherein ​ 6. The motor rotor press fitting apparatus according to claim 1, wherein The driving assembly comprises a driver and a connecting shaft, one end of the connecting shaft is connected with the pressing head, the other end of the connecting shaft is connected with the output shaft of the driver, the connecting shaft is provided with a second avoiding hole for the rotating shaft to pass through, and the second avoiding hole is communicated with the second accommodating cavity.

7. The motor rotor press fitting apparatus according to any one of claims 1 to 6, characterized by The machine frame comprises oppositely arranged first and second mounting frames, the fixing seat is mounted on the first mounting frame, and the driving assembly is mounted on the second mounting frame.

8. A method of press-fitting an electric machine rotor, which is carried out using the electric machine rotor press-fitting device according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: Clamp the rotating shaft of the rotor to the rotating seat, and position the rotating seat to a first preset position through the positioning structure; Clamp the first end plate of the rotor to the pressing head, drive the pressing head to move towards the rotating seat through the driving assembly, and press the first end plate to the rotating shaft; Clamp the first-stage iron core of the rotor to the pressing head, drive the pressing head to move towards the rotating seat through the driving assembly, and press the first-stage iron core to the rotating shaft; Position the rotating seat to a next preset position through the positioning structure, and press the next-stage iron core of the rotor to the rotating shaft through the pressing mechanism; Repeat the previous step until all the iron cores are sequentially pressed to the rotating shaft; Position the rotating seat to the first preset position through the positioning structure, and press the second end plate of the rotor to the rotating shaft through the pressing mechanism; Clamp the fixing ring of the rotor to the rotating shaft, and press the fixing ring to the rotating shaft through the pressing mechanism.

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